Siemens 3VA5145-5EC31-0AA0 Molded Case Circuit Breaker
- 45A
- 3 Pole
- Panel Mount
Siemens
3VA5145-5EC31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5145-5EC31-0AA0
Quantity
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Siemens 3VA5145-5EC31-0AA0 - 45A 3 Pole Molded Case Circuit Breaker
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Description
Operating with a TM230 thermal-magnetic trip unit, this 45A molded case circuit breaker delivers reliable long-time and adjustable instantaneous protection. It serves as a robust solution for commercial and industrial power distribution systems requiring 35kAIC at 480VAC. The unit installs into Siemens 3VA switchboards and adapts to legacy P1 or P2 panelboards using a mounting kit. Serving as a modern upgrade, it replaces discontinued ED43B045 frames while offering current-limiting performance.Specifications
| Brand | Siemens |
|---|---|
| Series | 3VA5 |
| Amperage | 45A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600Y/347VAC, 85kA @ 500VDC |
| Frame Type | 3VA51 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens 3VA Panelboards, Switchboards; Siemens P1, P2 Panelboards (with adapter) |
| Wire Gauge | 14-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Handle Padlock Attachment, DIN Rail Adapter, Lug Kits |
|---|---|
| Accessories | None (Without Connection) |
| Standards | IEC 60947-2, UL 489, CSA C22.2 No. 5 |
| Approval | ABS, CE, CSA, cULus, DNV, EAC, GL, Lloyd's, RCM, UL, VDE |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
7 answersWhat panelboards are compatible with the 3VA5145-5EC31-0AA0?
This breaker is designed for use in Siemens 3VA panelboards and switchboards. It can also be installed in Siemens P1 and P2 panelboards when using the appropriate mounting adapter.
What is the frame size of this Siemens circuit breaker?
The 3VA5145-5EC31-0AA0 belongs to the 3VA51 frame family, which is a 125A maximum frame size.
What does the LI trip function indicate on this 45A breaker?
The LI designation means the thermal magnetic trip unit provides Long-Time (L) overload protection and Instantaneous (I) short-circuit protection. On this specific model, the thermal setting is fixed at 45 amps, while the magnetic trip is adjustable.
What wire sizes are accepted by the lugs on this breaker?
The included lugs are rated to accept wire gauges from 14 AWG up to 2 AWG.
Can the 3VA5145-5EC31-0AA0 be reverse fed?
Yes, Siemens 3VA5 molded case circuit breakers are suitable for reverse feed applications, allowing for flexible installation orientations.
Is this 3-pole breaker rated for use in DC electrical systems?
Yes, in addition to its AC ratings, this breaker is rated for 500VDC with an interrupting capacity of 85kA.
What breaking capacity class does the 3VA5145-5EC31-0AA0 fall under?
This breaker features a Class M (Medium) breaking capacity, which provides a 35kA interrupting rating at 480VAC.
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Reviews
Review summary
Customers rate this product 4.8 out of 5 based on 8 reviews.
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Rating
8 reviews
- EAEdward A.Verified BuyerReviewingSiemens 3VA5112-5EC31-0AA0 - 125A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/11/26Quick Shipping
Instock and quick free shipping over a $100
- JFJustin F.Verified BuyerReviewingSiemens 3VA5450-5EC31-0AA0 - 500A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/2/26SIEMENS BREAKER WAS SENT NEXT DAY...
ORDER CAME WHEN IT WAS PROMISSED AND WAS CORRECT... HAPPY CUSTOMER.
THANK YOU,
JUSTIN
- GMGary M.Verified BuyerRated 4 out of 5 stars6/19/26Hard to find Siemens breaker
Great product at a fair price
- RJRene J.Verified BuyerReviewingSiemens 3VA5212-6EF31-0AA0 - 125A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars4/13/26Siemens 3VA5212-6EF31-0AA0
Item arrived quickly and in perfect condition
- DTDENNIS T.Verified BuyerReviewingSiemens 3VA5220-6ED31-0AA0 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/15/26Breaker Purchase
Great price and fast shipment